gdb/dwarf2loc.h

   1 /* DWARF 2 location expression support for GDB.
   2
   3    Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #if !defined (DWARF2LOC_H)
  22 #define DWARF2LOC_H
  23
  24 struct symbol_computed_ops;
  25 struct objfile;
  26 struct dwarf2_per_cu_data;
  27
  28 /* This header is private to the DWARF-2 reader.  It is shared between
  29    dwarf2read.c and dwarf2loc.c.  */
  30
  31 /* Return the OBJFILE associated with the compilation unit CU.  */
  32 struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
  33
  34 /* Return the address size given in the compilation unit header for CU.  */
  35 CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
  36
  37 /* Return the offset size given in the compilation unit header for CU.  */
  38 int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu);
  39
  40 struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block
  41   (unsigned int offset, struct dwarf2_per_cu_data *per_cu);
  42
  43 /* The symbol location baton types used by the DWARF-2 reader (i.e.
  44    SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  "struct
  45    dwarf2_locexpr_baton" is for a symbol with a single location
  46    expression; "struct dwarf2_loclist_baton" is for a symbol with a
  47    location list.  */
  48
  49 struct dwarf2_locexpr_baton
  50 {
  51   /* Pointer to the start of the location expression.  */
  52   const gdb_byte *data;
  53
  54   /* Length of the location expression.  */
  55   unsigned long size;
  56
  57   /* The compilation unit containing the symbol whose location
  58      we're computing.  */
  59   struct dwarf2_per_cu_data *per_cu;
  60 };
  61
  62 struct dwarf2_loclist_baton
  63 {
  64   /* The initial base address for the location list, based on the compilation
  65      unit.  */
  66   CORE_ADDR base_address;
  67
  68   /* Pointer to the start of the location list.  */
  69   const gdb_byte *data;
  70
  71   /* Length of the location list.  */
  72   unsigned long size;
  73
  74   /* The compilation unit containing the symbol whose location
  75      we're computing.  */
  76   struct dwarf2_per_cu_data *per_cu;
  77 };
  78
  79 extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
  80 extern const struct symbol_computed_ops dwarf2_loclist_funcs;
  81
  82 #endif /* dwarf2loc.h */